“If wits were pins, the man would be a veritable hedgehog.”

“Mosca felt filled with panic. She was an arsonist, runaway, thief, spy and murderer’s accomplice, and here she was of her own free will taking step after weak-kneed step towards the prison. She turned a final corner, and now she could see the prison waiting to pounce on her, crouched behind the watch house like a panther behind a mound. The prison – the ‘louse house’, the ‘tribulation’, the ‘stone jug’, the ‘naskin’. It would put out a great paw to pin her, and she would never escape it again.”

“Lies can be wrung out of a witness as easily as truth. Yes, after a few hours with the Enquiry’s . . . instruments, I am sure she will be willing to swear that she had swallowed an antidote, or indeed that she had flown to the moon if that would make the pain stop. But, here and now, you can see she is telling the truth. There was no betrayal. There was no poison. There was no murder.”

“She lay there with her eyes closed, as if sleep were a shy creature that might venture out if she played dead. But every time it seemed to be drawing closer, some loud thought would crash and blunder through the undergrowth, putting it to flight.”

“Sometimes she felt she would like to engulf him like a trap-lantern, and never share him with anyone or anything else again, not even the light. Even his obsession with ruling Caverna pained her, as if the city were a woman, and a rival.”

“Just for a moment Neverfell felt as if there were an invisible wire pulled to razor tautness between her and the other girl, humming tension into the room. If she blundered towards it, it might snap or cut her, and yet she half wished it would, so that she knew where it was.”

“She had told Erstwhile too much in the past, and thus he knew that occasionally she did go crazy. Sometimes it was when she felt particularly trapped or hopeless, or when the tunnels were unusually dark or stuffy, or when she got stuck in a crawl-through. Sometimes it happened for no obvious reason at all. She would feel a terrible panic tightening her chest and giving her heart a queasy lollop, she would be fighting for breath . . . and then she would be recovering somewhere, shuddering and sick, devastation around her and her fingernails broken from clawing at the rock walls and ceilings.”